Gwyneth Dickey

All Stories by Gwyneth Dickey

  1. Health & Medicine

    Gut bacteria reflect dietary differences

    A comparison of African and European children concludes that high-fiber, low-fat diets cultivate healthier intestinal microflora.

  2. Life

    Noisy bacteria

    Cell-by-cell analysis finds big differences among genetically identical cells.

  3. Life

    Genetics redraws marsupial family tree

    A new analysis traces the group’s origin to South America.

  4. Earth

    Researchers create global map of tree height

    A new map shows forest height around the globe and will improve estimates of how much carbon is stored in trees.

  5. Health & Medicine

    Diet and behavior changes may slow Alzheimer’s

    A new study in dogs finds that antioxidants and enriched lifestyle can ward off symptoms, and suggests brain plaques may not be the cause of the disease.

  6. Health & Medicine

    Gel shows promise against HIV

    Scientists have developed the first topical treatment that can prevent HIV infection among women.

  7. Life

    Animal sperm arose once

    A gene governing production of male reproductive cells goes back to a common ancestor that lived about 600 million years ago, a study finds.

  8. Space

    Snapshots of the past

    The Rosetta spacecraft returns images of asteroid 21 Lutetia.

  9. Planetary Science

    Up close and personal with an asteroid

    The Rosetta orbiter makes its second swing past a relic of the early solar system.

  10. Life

    Ocean acidification may make fish foolhardy

    Rising carbon dioxide alters fish larvae’s sense of smell, which they use to avoid predators and find their way home.

  11. Life

    Saber-toothed cats strong-armed prey

    Smilodon fatalis used strong forelimbs to pin victims, an analysis of fossils shows.

  12. Earth

    African fossils suggest complex life arose early

    Researchers find evidence that Earth’s earliest multicellular life got going 2.1 billion years ago.